BATTERY INSPECTION

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Warning
•  Since battery acid is toxic, be careful when handling the battery.
•  Since battery acid is highly corrosive, be careful not to allow it to contact clothing or the vehicle.
•  In case battery acid contacts skin, eyes, or clothing, flush it immediately with running water. If the acid gets in the eyes, flush with water for more than 15 min and get prompt medical attention.

Electrolyte Specific Gravity

Purpose

Step

Inspection

Results

Action
Battery examination (verification of dendrite short)
1
Using a hydrometer, measure the electrolyte gravity of all the cells and identify the one with the lowest electrolyte gravity value.
1.25 or more
Battery is normal.
1.17—1.25
Recharge the battery.
(See BATTERY RECHARGING.)
Less than 1.17
Replace the battery because it can be determined as a dendrite short.
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)


Parasitic Draw

Caution
•  Operating electrical loads while the parasitic draw is being measured can damage the tester.
•  Because the “BATT_SOC” value before disconnecting the negative battery terminal is required for the battery condition initial setting (i-stop setting), always verify the “BATT_SOC” value before disconnecting the negative battery terminal. (With i-stop only)

1.  Verify that the ignition is off and that all doors are closed.

2.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

Note
•  If the battery is not left undisturbed for 10 min or more the tester will indicate a high value (approx. 300 mA).
•  If the ignition or any electrical accessory is operated after the tester is connected, the battery must be left undisturbed for 40 min or more from that point.
•  For vehicles with the immobilizer system, the system periodically shifts synchronization of the security indicator light flashing. Therefore, 65 mA (0.1 s) current is supplied when the security indicator light is illuminated, and 40 mA (2 s) current is supplied when the security indicator light is not illuminated. In addition, the measuring instrument, which shows the average value, indicates around 55 mA.

3.  Connect the tester between the negative battery terminal and negative battery cable, leave the battery undisturbed for 40 min or more and then measure the parasitic draw.

•  If not within specification, measure the parasitic draw while removing the fuses one by one from the inside of the main fuse block and the inside of the fuse block.
•  Inspect and repair wiring harnesses and connectors of the fuse where the current has decreased.
Battery parasitic draw (When the ignition is off, all doors and the bonnet are closed.)
40—65 mA


Battery inspection when i-stop warning light (amber) is flashing

1.  Inspect the battery as follows:

Step

Inspection

Results

Action
1
Verify that the pending code for DTC P0A8F or DTC P0A8F is detected using the M-MDS.
DTC P0A8F is detected
Replace the battery.
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
Pending code for DTC P0A8F is detected
Go to the next step.
2
Was the vehicle engine not started for 5 days or more?
(Ask the customer)
Yes
Go to the next step.
No
Go to Step 4.
3
After starting the engine, verify that the DTC P0A8F is detected.
Is DTC P0A8F detected?
Yes
Replace the battery.
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
No
Go to the next step.
4
Using a hydrometer, measure the electrolyte gravity of all the cells and identify the one with the lowest electrolyte gravity value.
1.25 or more
Battery is normal.
1.17—1.25
Recharge the battery.
(See BATTERY RECHARGING.)
Less than 1.17
Replace the battery because it can be determined as a dendrite short.
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
5
After performing any of the following work, verify that the i-stop warning light (amber) turns off.
•  Battery terminal is disconnected and ignition is switched ON (engine off) after reconnection
•  Ignition is switched ON (engine off) after 12 hours or more have elapsed with ignition switched off